clear
input year GDP lysr
1979 4062.579191 2.63
1980 4545.623973 6.17
1981 4891.561062 7.85
1982 5323.350965 8.43
1983 5962.651568 9.41
1984 7208.051718 11.31
1985 9016.036581 12.5
1986 10275.17922 15.31
1987 12058.61513 18.62
1988 15042.82301 22.47
1989 16992.31911 18.6
1990 18667.82238 22.18
1991 21781.49941 28.45
1992 26923.47645 39.47
1993 35333.92471 46.83
1994 48197.85644 73.23
1995 60793.72921 87.33
1996 71176.59165 102
1997 78973.035 120.74
1998 84402.27977 126.02
1999 89677.05475 140.99
2000 99214.55431 162.24
2001 109655.1706 177.92
2002 120332.6893 203.85
2003 135822.7561 174.06
2004 159878.3379 257.39
2005 183217.4 292.96
2006 211923.5 339.49
2007 257305.6 419.19
2008 300670 408.43
end
scatter GDP year
title("GDP")
subtitle("1978-2008")

谁帮我看看这里面哪错了啊！title和subtitle总是不能出来，还有以下的错误提示：

. title("GDP")
unrecognized command:  title
r(199);
.
. subtitle("1978-2008")
unrecognized command:  subtitle
r(199);
哪位好人帮我看看哪里写错了！谢谢了！